Friction-facing on transmission-belting



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Patented May 25, 1920.

IN VEN TOR 05667 5, kwm/ea A TTORNEYS N BELTING.

APPLlCATlON FILED MAR. I. 1919.

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ROBERT S. KINNAIRD, OF INDIANAPOLIS, INDIANA, ASSIGNOR 'IO HIDE LEATHER8t IBEL'IING COMPANY, OF INDIANAPOLIS, INDIANA, A. CORPORATION.

FRICTION-FACING 0N TRANSMISSION-BELTING.

Application filed March 1, 1919.

To all whom it may concern:

Be it known that I, ROBERT S. KINNAIRD, a citizen of the United States,and a resident of Indianapolis, county of Marion, and State ofIndiana,have invented a certain new and useful Friction- Facing on Transmission-Belting; and I do hereby declare that the following is a full, clear,and exact description thereof, reference being had to the accompanyingdrawings, in which like numerals. refer to like parts.

This invention relates to a driving or friction belt especially adaptedto driving purposes and morespecifically to use as a fan driving beltfor automobiles. The main object of the invention is to secure a greatergripping effect, or a greater coefficient of friction. This isaccomplished by providing a cork surface to a leather belt. The corksurface will give a greater pulling and driving effect in a belt, asthere is not only a greater coeflicient of friction in the cork, surfacethan in any other mechanical-material, but it will not radically beefiected by oil or heat. While there would be no danger of the corksurface charring from the heat, such effect would increase thecoefficient of friction. It will be noted, therefore, that by combininga cork surface with aleather belt, there is produced a friction surfaceof maximum coefficient, combined with the strength of the leather belt.A further description of this invention will appear in the specificationand claim.

In the accompanying drawing whichis made a part of this application,igure 1 is a side elevation of a driving pulley, a driven pulley, andthe driving belt with the cork surface thereon. 'Fig. 2 is a perspectiveview of the driving belt with said surface. Fig. 3 is-a cross sectionthrough said belt.

Specification of Letters Patent.

Patented May 25, 1920.

Serial No. 280,117.

There is shown in the drawing a driving pulley 10 and a driven pulley11, said pulley 11 being driven by a leather driving belt 12 having afriction surface 13 formed of a cork facing which is cemented to theinner the leather is buffed in the usual manner of bufling leather toallow the penetration of cement and the firm. adhesion of the cork tothe leather. Probably the ordinary manner V of securing the cork to theleather would be to cement the cork tothe flesh side thereof, as thatside is naturally the better to cement to. However, the flesh side isnot as firm as the grain side and if the cork were cemented to the fleshside a creeping effect might set up from the looseness thereof, whichwould cause buckling and disintegration ofthe cork surface strip.

The invention claimed is:

A friction belt including a leather body,

having the grain side thereof bufi'ed, and a cork facing cemented to thegrain side of said leather body for forming the friction surface of saidbelt.

In witness whereof I have hereunto affixed my signature.

" ROBERT S. KI-NNAIRD.

.Witness A. W. REITH.

